Narrowing searches based on url, author, date, and other attributes is also possible. For instance, the query [ Streisand sourcename:Techdirt ] restricts searches for "Streisand" to items from the blog "Techdirt".
Examples of other operators follow:

sourceurl:http://www.theverge.com/

items from the blog http://www.theverge.com/

sourcename:"New York"

items from blogs with "New York" in the name

date:10/20/11

items that appeared on 10/20/11

date:[10/1/11 TO 10/20/11]

items appearing between 10/1/11 and 10/20/11

author:"Bill Gates"

items by author "Bill Gates"

title:unsubstantiated

items with "unsubstantiated" in the title

body:"severely polluted"

items with "severely polluted" in the body

link:http://www.marco.org/2011/04/16/rumored-apple-hdtv

items linking to http://www.marco.org/2011/04/16/rumored-apple-hdtv

Note: all operators that take urls will accept simple domain names, which match any item at that domain, or complete item urls.

Pandora to release day pass for ad-free listening
— Credit: Shutterstock / Evgeny Korshenkov — Pandora is looking to add a paid day pass to its service later this year, company executives revealed during Pandora's investor day Thursday. The day pass will give users …

Judge halts movie industry-backed probe against Google
— A federal judge has agreed to put the brakes on an investigation into Google by Mississippi Attorney General, Jim Hood, after the company complained that Hood's inquiry was an illegal censorship campaign cooked up by Hollywood.

Amid new watches, Android Wear crosses 1M downloads
— The number of Android Wear downloads has crossed the into the one to five million range on Google Play, suggesting that around one million people are wearing smartwatches powered by Google software. — Last month, estimates …

Spyware firm Gamma failed on human rights, says OECD
— The Organisation for Economic Co-operation and Development has for the first time found a surveillance software company to be in violation of human rights guidelines, following a complaint about the notorious British-German spyware outfit Gamma International.

Net Neutrality day is here: a guide to today's vote
— Credit: Gigaom illustration adapted from Shutterstock — Credit: Gigaom illustration adapted from Shutterstock — What is the right way to run the internet? After months of pitched debate over so-called net neutrality …